/*
 * Copyright (C) 2008 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;

import java.util.Collections;
import java.util.List;
import java.util.SortedSet;

/**
 * Create string sets for testing collections that are sorted by natural ordering.
 *
 * @author Jared Levy
 */
@GwtCompatible
public abstract class TestStringSortedSetGenerator extends TestStringSetGenerator
        implements TestSortedSetGenerator<String>
{

    @Override
    public SortedSet<String> create(Object... elements)
    {
        return (SortedSet<String>) super.create(elements);
    }

    @Override
    protected abstract SortedSet<String> create(String[] elements);

    /**
     * Sorts the elements by their natural ordering.
     */
    @Override
    public List<String> order(List<String> insertionOrder)
    {
        Collections.sort(insertionOrder);
        return insertionOrder;
    }

    @Override
    public String belowSamplesLesser()
    {
        return "!! a";
    }

    @Override
    public String belowSamplesGreater()
    {
        return "!! b";
    }

    @Override
    public String aboveSamplesLesser()
    {
        return "~~ a";
    }

    @Override
    public String aboveSamplesGreater()
    {
        return "~~ b";
    }
}
